This power control from a 1968 Motorola manual shows how to use a contemporary diac as a zero-crossing detector. The SCR is of the type depending on the power of the load.
This circuit is suggested by Texas Instruments' Linear Circuits Applications. It consists of an...
Radio Electronics magazine in November 1962 published in an article several circuits with tunnel...
This circuit generates a signal corresponding to the harmonic of the crystal used. The frequency is...